Page 5
PROBE SIGNAL
PROBE DETECT
+24VDC
PROBE
KP-3
PN:14912
WHT
200507
CEM
Sheet 1 of 1
3
S15020.DWG
Date:
Filename:
Drawn by:
Title:
Ver:
ACORN_rev4, KP-3 PROBE
SHIELDED ETHERNET CABLE FROM PC
+24VDC
+24VDC
YEL
BLK
COM
V1 (+5 VDC) 2.2A
N
L
MEANWELL
RD-35B
V2 (+24 VDC) 1.0A
110VAC
BLK
WHT
GRN
GRN
ETH
ER
N
ET
IN3
IN2
IN1
IN4
IN
7
IN
6
IN
5
IN
8
24 I
N
24 IN
H8
H9
H4
H1
H6
H2
H3
+2
4
EN
3
ST4
EN
4
DR3
C
OM
DR4
C
OM
ST3
EN
1
ST2
EN
2
DR1
C
OM
DR2
C
OM
ST1
5
1
6
9
P10
P10
PIN 1 = N/C
PIN 2 = COM
PIN 3 = Z\
PIN 4 = A\
PIN 5 = B\
PIN 9 = +5VDC
PIN 8 = B
PIN 7 = A
PIN 6 = Z
5
9
4
8
3
7
2
6
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Output 1
Output 2
Output 3
Output 4
Step 1
Step 2
Step 3
Step 4
Direction 1
Direction 2
Direction 4
Direction 3
Input 5
Input 1
Input 2
Input 3
Input 4
COM
Chassis GND
H6
1
13
25
14
AN
GN
D
AN
OU
T
+
24V
DC
C
OM
+
24V
DC
C
OM
C
H
ASSIS
PN:14445
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
5V
H10
8
7
6
5
4
3
2
1
HB
COM
H10
OU
TPU
T
STATES
AC
OR
N
190201
Acorn_rev3 has REMOVABLE green screw terminal blocks
Acorn_rev2 has FIXED green screw terminal blocks
How to tell the difference between Acorn_rev2, Acorn_rev3 and Acorn_rev4
Acorn_rev4 has LED indicators for the Inputs and Outputs
GROUNDS ARE
110VAC IS
GREEN
VIOLET
GND
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
VCC
RELAY BOARD
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT2
OUT1
ACORN I/O
1
2
3
4
INPUTS
OUTPUTS
ACORN I/O
5
6
7
8
INPUTS
ProbeDetect
ProbeTripped
OUTPUTS
RED
BLK
COM
C
OM
COM
CABLE PN:14947
INCLUDED WITH KP-3
KP-3 Wiring to Acorn
Download full size PDF’s of all Acorn schematics including this KP-3 to Acorn hookup schematic on the Acorn web page
https://www.centroidcnc.com/centroid_diy/acorn_cnc_controller.html
Often it is necessary to extend the KP-3 cable. Typically this can be accomplished several ways
1.) simply extend the flying lead wires by soldering and heat shrinking on additional length of similar wire.
2.) Run the flying lead wires to a terminal strip and use another piece of cable to run from the terminal strip to the Acorn.
